Eobeet samuel lovelace



NiTED ROBERT SAMUEL LOVELAOE, OF HENSTRIDGE, ENGLAND.

METHOD OF TOUGHENING OR STRENGTHENING METAL.

SPECIFICATION forming part of Letters Patent No. 577,869, dated March 2, 1897. Application filed October 23, 1896. Serial No. 609,854. (No specimens.)

To all whom it may concern:

Be it known that I, ROBERT SAMUEL LOVE- LACE, a subject of the Queen of England, residing at Henstridge. Somerset, England, have invented certain new and useful Improvements in or Relating to the Toughening or Strengthening of Metal and Brazed and Similar Joints, of which the following is a specification.

This invention relates to the toughening or strengthening of metal in various forms, particularly steel tubes such as are employed in the manufacture of cycles and other similar structures. The invention is also applicable and useful for brazed and similar joints.

The chief effect which I obtain in the toughening or strengthening of the metalis by the application of india-rubber, which I find has the effect of greatly toughening or strengthenin g the metal. The rubber may be applied in various ways-for example, simply by rub bing it on; but I prefer to apply it in the form of a solution or liquid, into which the metal, after it has been heated, can be dipped, or which can be poured over the heated metal, thus cooling and, in effect, tempering it.

The liquid may be formed of oil or fat, (linseed-oil is a good material for the purpose,) borax and soda being added in suitable proportions, with which is mixed the rubber, which for convenience may be added in a state of solution. These ingredients may be stirred up together, but they mix best under the influence of the hot metal, which is dipped into them.

The piece of metal, or the portion of metal,

or the brazed or other joint to be treated is dipped when suitably heated, preferably to a good blood-red, into the solution above described, and is left in it or moved about in it until fairly cool, when it may be withdrawn and dried.

The treatment may be applied to any portion of the metal; but for cycle-frames I find that it is often advantageous to treat only the joints and a short portion of each tube contiguous to the joint, in order to make the One example of a tempering and toughening solution according to this invention is a mixture with one gallon of oil of a quarter of a pound of india-rubber solution, a quarter of a pound of soda, and a quarter of a pound of borax; but this invention is not limited to the use of these ingredients in the proportions above referred to by way of illustration.

I claim- 1. The herein-described mode of treating metal, which consists in applying a solution containing india-rubber to the metal while the latter is in a heated condition.

2. The herein-described mode of treating metal, which consists in applying a solution containing india-rubber to the metal while the latter is at a blood-red heat.

3. The herein-described mode of treating metal, which consists in dipping the metal while in a heated condition into a solution containing india-rubber, and allowing the metal to remain in the solution until fairly cool.

4.. The herein-described mode of treating metal, which consists in applying a solution containing an oil, fat or grease and india-rubber to the metal while the latter is in a heated condition.

5. A tempering and toughening solution for metal, comprising linseed-oil, and indiarubber.

6. A tempering and toughening solution for metal comprising oil, fat or grease, indiarubber, soda and borax.

In witness whereof I have hereto set my hand in the presence of the two subscribing witnesses.

ROBERT SAMUEL LovnLAoE.

Witnesses:

HAROLD WADE, HARRY B. BRIDGER. 

